The goal of this work is to study in detail and determine the phenomenological implications of a freshly proposed dynamical –and technically natural– scenario, which solves the strong CP problem with an axion much lighter than the canonical QCD one [1]}, [2]}. Next, we show that dark matter
can be accounted for by this extremely light axion and that features a novel production mechanism in the early Universe: the trapped misalignment mechanism [3]}.
